In the manufacturing of machine tool transformers, lamination is an important manufacturing link that determines the production quality of transformers, and its process level determines the quality of the core. Its body is stacked by electrical magnetic silicon steel sheets, and the requirements are: clean surface, accurate positioning, and compact and uniform lamination.

Before lamination of the transformer, it is necessary to inspect the incoming silicon steel sheets to ensure that the surface is clean and pollution-free as much as possible, and the performance is accurate and consistent.

The instruments for testing include: online thickness gauge, loss gauge, coating insulation test, pinhole tester, etc.; the test items include: silicon steel sheet surface quality, unit loss, material thickness, coating insulation, etc.

During the lamination process, the positioning accuracy of each silicon steel sheet is the premise to ensure the consistency of various parameters. During the lamination process, the lamination must be carried out strictly in accordance with the drawing standards, and the following points should be noted: window height error, window width error, diagonal, core up and down, window width error, and error between diagonal and core center line. Reducing positioning errors can minimize the impact of shear stress on silicon steel sheets and ensure the various properties of the finished core.

Most of the laminations are completed under manual assembly. There will be certain gaps between the core laminations, which will also have a certain impact on the performance of the transformer, mainly producing the following results:

1. Affecting the magnetic flux density: The gap between the laminations causes uneven distribution of magnetic flux density, thereby affecting the change of the magnetic field. When the magnetic flux density is too high, it may lead to magnetic saturation and reduce the output voltage of the transformer; when the magnetic flux density is too low, it may not meet the working requirements of the equipment.

2. Generate losses: The magnetic flux density at the gap is higher, resulting in more hysteresis loss and eddy current loss. The efficiency of the transformer is reduced, the operating temperature is increased, and the life of the equipment is affected.

3. Cause noise: The gap in the core will aggravate the air vibration caused by the change of the magnetic field, causing abnormal noise and interfering with the operation of the equipment.

In addition, after the lamination is completed, the lamination can be surface pretreated and coated with materials according to the actual functional needs to improve the overall aesthetics and corrosion resistance of the transformer. Ensure that the core is not affected by environmental factors such as dust, moisture, rain, snow, and salt spray.

The above is an introduction to the lamination process of machine tool transformers. We at Leilang Electric use high-quality brand new silicon steel sheet lamination cores, which have the advantages of excellent magnetic flux, high mechanical strength, clean and shiny surface, and exquisite lamination process. Use high-quality raw materials to create more reliable products. Leilang Electric is worthy of your trust!